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    Isomorphic group

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    Consider the cartesian product H=Z_2 X Z_n (as a set).Define a binary operation on H to be (i,j)*(k,l)=(i+k,(-1)^k *j+l), where i,j,k and l are vectors.

    Show that H is a group under this operation, determine its order.

    Let G = < a,b|a^n=1, b^2=1, abab^-1=1 >
    Show that |G|<=2n.

    Show that H is isomorphic to G.

    See attached file

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    Solution Summary

    This provides an example of proving something is a group and that it is isomorphic.